The questions before the court in this case did not involve criminal activity, therefore, there was no reason for a grand jury to be involved. There was no one to be indicted. Nor was there any question of fact to be put before a petit jury.
All of the decisions in this case were decided by a judge, in fact, one particular judge. The higher courts have all decided questions of law, basically, whether the judge had the authority to make the decisions he made. They have ruled that he does. There is the question of whether or not this judge has an agenda in this case. Judges are supposed to be impartial. If they are not, the system breaks down.
The other two branches of government act as a balance to the third. They have chosen to act in this case. The Florida legislature has passed a new law, and the governor has signed it. There is nothing new about this process. Legislatures pass new laws all the time when they perceive that old laws are inadequate.